1 pound=3500 calories. So the equation is as follows: (change calories per week)/ (3500 calories) = your change in body weight per week in pounds. So if you are increasing your intake by 500 calories a day (3500 calories per week) then the equation is: (3500)/ (3500) = 1 pound a week. If you increase your daily caloric intake by 500 calories then you should gain ten pounds within ten weeks.
In English the above equation means that you need to eat 3500 calories above your minimum caloric requirement which varies from person to person. However what remains the same is you only need to eat an additional 3500 calories to gain one pound. If you don’t exercise and burn off the additional calories, they will be stored as fat. Realistically it would not be hard to gain a pound of fat in one week if you were way out of control with your eating habits. Let’s play devil’s advocate for a moment and cut by 50% the one pound per week number (which would be 4 pounds per month, 48 pounds per year) lets make it 2 pounds per month which is 24 pounds per year, which is more realistic. Now multiply one year of weight gain by 5 years. 24×5=120 pounds!
Here is some food for thought…no pun intended: Here are the calories in a typical lunch from McDonald’s.
A Double Quarter Pounder with Cheese has 750 calories
An order of large French fries has 400 calories
A small Coke is 150 calories
The total for this meal: 1300 calories. You’d only need to eat this a little over twice in one week to reach 3500 calories. Can you imagine? This is just one meal out of an entire week! Throw in some ice cream, alcohol, pizza, potato chips, cookies and you could easily be way way over the extra 3500 calories you’d need to gain that extra pound.